when parents or teachers are near.可知，A PENGO WATCH CONTROL作电视和视频的遥控器、能预报天气、提醒你什么时候交作业和当父母和老师在旁边时做出无声警告，故选C。

【3题详解】

数字计算题。根据第一部分最后Originally (最初) sold for $499 NOW ONLY 299可知，现在的售价是299，故选B。

【4题详解】

推理判断题。第一则广告介绍的是帮助学生完成作业和整理物品的Personal Robot，第二则广告介绍的是提醒交作业、预报天气、提示老师或父母在附近的智能手表；再根据结尾处的click here.可知是网页，所以这两则广告最可能出现在青少年网站上，故选B。

【点睛】本文小题4考查了推理判断题。推理判断题是层次较高的题目。本文涉及的推理判断题的考法是推断文章出处。此类题必须先看文章的题材属于哪一类，辅助加以判断。还要结合文意，看文章主要讲述的内容，这是判断的主要依据。生活常识也可帮助我们做出正确选择。比如小题4考查文章出处，第一则广告介绍的是帮助学生完成作业和整理物品的Personal Robot，第二则广告介绍的是提醒交作业、预报天气、提示老师或父母在附近的智能手表。内容较多不会出现在布告牌上；广告是介绍产品，号召购买，面向的是消费者，所以不会是公司手册的内容；根据广告适合的对象可知是中小学生不是大学生，此类文章也不会出现在大学报纸上；两则广告都面向的是中小学生，再根据结尾处的click here.可知是网页，所以此类广告可能会出现在青少年网站上，故选C。

　　Some people seem to have great memories. Zheng Aiqiang, a "memory athlete" on TV show Super Brain, can remember 2,660 numbers in just one hour!

　　You would think people like this have special brains. But according to a recent study by researchers from the US and the Netherlands, the brain structures of ordinary people and 23 of the world's leading memory athletes show no difference.

　　That's because good memories can be trained. New research in the journal Neuron(神经元期刊) suggests that you can become a super memorizer with just six weeks of hard training.

Researchers found that technique(技巧) called loci, invented by ancient Greeks, can greatly help improve memory. By using loci, you are using your imagination to improve the brain's memory networks. You can link(关联) something you need to remember with a place that you know very well. For example, to remember a list of numbers, imagine yourself walking through your house.